Re: Kellenberger Kel-Vista UR 175/1000 - Turret sticking
Derek Hall with Hardinge stated that it would most likely be the hydraulic pump or hydraulic valve. He said to watch the pressure gauge when it's operating normally as a reference, than watch the gauge when it's acting up.
If it's lacking power, than probably the pump.
He didn't say it, but I'm assuming, that if the pressure is there but the table isn't lifting, that maybe the valve is going bad?